Let's not forget the frequency and distribution matter. Quantity alone is just one variable.
post #16 of 151
7/25/08 at 3:20pm
No, it's a logical impossibility for anything to go faster than the speed of light based on current physical theories which have been shown to be accurate to very very small margins of error. It's not a matter of not having discovered anything. It's a simple consequence of the mathematics that it can't happen.
One can say that nothing goes faster than light as surely as one can say if you let go of something on Earth it'll fall.
Why can't someone conduct a study into the audibility of things such as jitter and settle it properly in a scientific fashion? This kind of debating is pointless.
The people who know, the ones that on a daily bases mod cdplayers, say that if you use a good reclocking system yoú'll get better transparency/detail.
Low is plus or minus 0.1 Parts per million. See for example the specs on the Esoteric Master Clocks.
Most popular reclocking systems are in terms of 2-3pps. This is far and beyond the popular threshold of 150pps.
This has been done.
Detection threshold for distortions due to jitter on digital audio
Kaoru Ashihara, Shogo Kiryu, Nobuo Koizumi, Akira Nishimura,
Juro Ohga, Masaki Sawaguchi and Shokichiro Yoshikawa
E. Benjamin and B. Gannon, ‘‘Theoretical and audible effects of
jitter on digital audio quality,’’ Preprint of the 105th AES
Convention, #4826 (1998).
K. Ashihara and S. Kiryu, ‘‘Simulation of sound degradation
due to time jitter on digital audio,’’ J. Acoust. Soc. Jpn. (J), 58,
K. Ashihara and S. Kiryu, ‘‘The maximum permissible size and
detection threshold of time jitter on digital audio,’’ J. Acoust.
Soc. Jpn. (J), 59, 241–249 (2003).
T. Tomizawa, H. Ohtake and J. Ohga, ‘‘Effect of jitter for
listening by a few musical signals,’’ Proc. Spring Meet. Acoust.
Soc. Jpn., pp. 703–704 (2003).
All peer reviewed papers.
Researchers include white-coated and dome-headed types from
National Institute of Advanced Industrial Science and Technology(Japan)
Tokyo University of Information Sciences,
Shibaura Institute of Technology
Japan Broadcasting Corporation
Media Laboratory S
What was the upshot ?
There are still too many people claiming that digital cables sound different, etc. to completely ignore the possibility that jitter could be a real concern.
Anyone can claim anything, backing it up is somewhat different. As far as I am aware there have been no decent controlled tests that have indicated reliably detectable audible differences between digital cables. This is puzzling as you would think that cable makers would be falling over themselves to demonstrate how their cables are provably better than Brand X cables...